if your p.fruits column is varchar (which is not suitable for this situation, but if so), your query will look like
where β¦ ( concat(',', p.fruits , β,β) like β%,1,%β
or concat(',', p.fruits , β,β) like β%,4,%β or concat(',',p.fruits , β,β) like β%,7,%β ) ...
, .
, ..
user_fruits (fk_user_id int, fruit_id int) user_fruits